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Open AccessArticle

Glyphosate Plus Carboxylic Compounds Boost Activity of Free Radical-Scavenging Enzymes in Sugarcane

1
School of Engineering, São Paulo State University (Unesp), Ilha Solteira, São Paulo 17900-000, Brazil
2
College of Agricultural and Technological Sciences, São Paulo State University (Unesp), Dracena, São Paulo 15385-000, Brazil
3
Brazilian Agricultural Research Corporation (Embrapa), Jaguariúna, São Paulo 13820-000, Brazil
*
Author to whom correspondence should be addressed.
Agriculture 2020, 10(4), 106; https://doi.org/10.3390/agriculture10040106
Received: 11 February 2020 / Revised: 27 February 2020 / Accepted: 27 February 2020 / Published: 3 April 2020
(This article belongs to the Special Issue Innovative Agronomic Practices for Maximizing Crop Growth and Yield)
Drought, heat, and salinity, as well as pests, are stressing agents, which have impressively declined the productivity and quality of sugarcane crop in harsh environments. Our study aimed to examine the effect of various chemical ripeners as alternatives to enhancing the reactiveness of the enzymatic antioxidant system of sugarcane crop. The field experiment consisted of spraying the ingredients, ethephon, ethyl-trinexapac, glyphosate, carboxylic compounds (MTD) and methyl-sulfumeturon on the Brazilian commercial varieties, SP80-1842 and SP80-3280, before flowering stage. The enzymatic assay comprised the monitoring of the rate of degradation of free radical by ascorbate peroxidase (APX), catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) in the extract from leaves of 11-month-old plants. Spraying glyphosate at 0.15 L ha−1 with MTD at 1.00 L ha−1 provided the highest activity of CAT, 0.65 µmol H2O2 min−1 mg−1 protein, in variety SP80-1842 Spraying glyphosate at 0.15 L ha−1 with ethephon at 0.33 L ha−1 caused the highest activity of APX, 1.70 nmol ascorbate min−1 mg−1 protein, in variety SP80-3280. The conclusion is, therefore, that mixtures of glyphosate with the insecticide/acaricide, MTD, and with the synthetic ethylene-releasing product, ethephon could help sugarcane crop grow adequately under uncontrollable or unpredictable agroecosystems like marginal lands. View Full-Text
Keywords: induced oxidative stress; plant growth regulators; Saccharum sp. induced oxidative stress; plant growth regulators; Saccharum sp.
MDPI and ACS Style

de Almeida Moreira, B.R.; da Silva Viana, R.; Monteiro de Figueiredo, P.A.; Manzani Lisboa, L.A.; Tadao Miasaki, C.; Chagas Magahães, A.; Bispo Ramos, S.; de Almeida Viana, C.R.; Dias Rezende Trindade, V.; May, A. Glyphosate Plus Carboxylic Compounds Boost Activity of Free Radical-Scavenging Enzymes in Sugarcane. Agriculture 2020, 10, 106.

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